Post Office knew its Horizon system was flawed and its star witness could not be relied on all the way back in 2013 and was so concerned it informed its insurers too - while continuing to prosecute innocent postmasters

[Katy]

Post Office knew its Horizon system was flawed and its star witness could not be relied on all the way back in 2013 and was so concerned it informed its insurers too - while continuing to prosecute innocent postmasters

Gareth Jenkins, the Cambridge maths graduate who served as the architect for the flawed Horizon accounting system, is believed to have requested immunity from prosecution.
Source: Post Office knew its Horizon system was flawed and its star witness could not be relied on all the way back in 2013 and was so concerned it informed its insurers too - while continuing to prosecute innocent postmasters